Chinese tourists dine onboard a boat at a pier at Chao Phraya River in Bangkok February 16, 2016. The perpetrators of last year's deadly explosion at a Bangkok shrine originally chose a pier packed with Chinese tourists as their primary target and had amassed enough chemicals to make 10 equally powerful bombs, the chief of Thailand's police bomb squad told Reuters. Picture taken February 16, 2016. REUTERS/Jorge Silva

Chinese tourists dine onboard a boat at a pier at Chao Phraya River in Bangkok February 16, 2016. The perpetrators of last year's deadly explosion at a Bangkok shrine originally chose a pier packed with Chinese tourists as their primary target and had amassed enough chemicals to make 10 equally powerful bombs, the chief of Thailand's police bomb squad told Reuters. Picture taken February 16, 2016. REUTERS/Jorge Silva